nas721 nas721
  • 26-01-2016
  • Mathematics
contestada

Use rounding or compatible numbers to estimate the sum. 256+321

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thetwicepianist
thetwicepianist thetwicepianist
  • 26-01-2016
you take 260 is close to 256, and 320 is close to 321, so 260+320=580.
About 580.
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Jennifer132
Jennifer132 Jennifer132
  • 26-01-2016
Since 256 is rounded to 260 and 321 is rounded to 320, 260+320= 580. So, 256+321 is about 580.
Answer Link

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